Method 1: There is a cheat on the back of the remote control.
Follow the instructions on the back of the remote control and hold down the "+"and "-"keys at the same time to unlock and close the lock easily.
Method 2: the secret in the small hole
Find the small hole on the back of the remote control and gently press it with a toothpick or sharp object to see if the "lock" sign on the display screen disappears. If it doesn't work, try again, it's definitely no problem!
Method 3: Battery reset method
Take down the air conditioning battery, install it again in a few minutes, restore the original factory settings, and all problems will be solved!